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Mixed Rare Specimens

Friday, 04 December 2020 07:00 PM

Introducing the "Mixed Rare Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including cechite, eudialyte, fluorapatite, hambergite, hematite, and hisingerite and more from places like Vrancice, Pribram, Bohemia, Czech Republic, Ilimaussaq complex, Narsaq, Kitaa prov., Greenland, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany, Tuften, Tvedalen, Larvik, Vestfold, Norway, Minas Gerais, Brazil, and Mt. Rasvumchorr, Khibiny Massif, Kola Peninsula, Russia.

Cechite

#54711
Locality
Vrancice, Pribram, Bohemia, Czech Republic 
Formula
PbFe2+VO4(OH) 
Availability
Available
Price
$30.00
Size
2 x 1 x 1 cm - Thumbnail 
Tagged
vanadium  

Not much of a specimen but has some black grains and a partial crystal to about 2mm.


Cechite

Formula
PbFe2+VO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
black 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
4.5-5 
On Dakota Matrix
Previously Sold Cechite
On Dakota Matrix
Other Available Cechite
WebMineral
View Cechite
Mindat
View Cechite

Eudialyte

with Aegerine in nepheline syenite - #54722
Locality
Ilimaussaq complex, Narsaq, Kitaa prov., Greenland 
Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Availability
Sold
Size
5 x 4 x 4 cm - Miniature 

A 2.5cm deep red Eudialyte crystal perched nicely on matrix with several smaller. By all accounts it is a good specimen.


Eudialyte

Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Tabular 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, yellow, yellowish brown, violet 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
5-5.5 
Mineralpedia
View Eudialyte
On Dakota Matrix
Previously Sold Eudialyte
On Dakota Matrix
Other Available Eudialyte
WebMineral
View Eudialyte
Mindat
View Eudialyte

Fluorapatite

with Fluorite - #AH54717
Locality
Ehrenfriedersdorf, Erzgebirge, Saxony, Germany 
Formula
Ca5(PO4)3
Availability
Sold
Size
8 x 7 x 8 cm - Sm Cabinet 
Tagged
phosphate  

There are two interesting sides to this specimen. One side has tiny purple crystals of Fluorite covering Fluorapatite on Quartz and the other, is no Fluorite but great Fluorapatite crystals to 3mm. 


Fluorapatite

Formula
Ca5(PO4)3
Crystal System
Hexagonal 
Crystal Habit
Massive - Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Resinous 
Color
blue, brown, colorless, violet, green 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Arnold G Hampson Collection

Hambergite

#54744
Locality
Tuften, Tvedalen, Larvik, Vestfold, Norway 
Formula
Be2BO3(OH) 
Availability
Sold
Size
6 x 4.5 x 4 cm - Sm Cabinet 
Tagged
beryllium  

Long bladed brownish rare Hambergite to 2.4cm. There are two Hambergite crystals, the other is 2.4cm also, but has a small section missing. 


Hambergite

Formula
Be2BO3(OH) 
Crystal System
Orthorhombic 
Cleavage
Perfect, Good, None 
Luster
Vitreous - Dull 
Color
colorless, gray white, yellowish white, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
7.5 

Hematite

#WR54693
Locality
Minas Gerais, Brazil 
Formula
Fe2O3 
Availability
Available
Price
$85.00
Size
7.5 x 6 x 3.5 cm - Sm Cabinet 

A thick plate of splendid Hematite.


Hematite

Formula
Fe2O3 
Crystal System
Trigonal 
Crystal Habit
Tabular, Blocky, Earthy 
Cleavage
None, None, None 
Luster
Metallic 
Color
reddish gray, black, blackish red 
Streak
reddish brown 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Conchoidal 
Hardness
6.5 
Collection
Willard L. Roberts Collection
Mineralpedia
View Hematite
On Dakota Matrix
Previously Sold Hematite
On Dakota Matrix
Other Available Hematite
WebMineral
View Hematite
Mindat
View Hematite

Hisingerite

#54736
Locality
Mt. Rasvumchorr, Khibiny Massif, Kola Peninsula, Russia 
Formula
Fe3+2Si2O5(OH)4·2H2
Availability
Available
Price
$40.00
Size
7 x 6 x 6 cm - Sm Cabinet 

Large crystal grains of reddish brown Hisingerite to 1.5cm with long Aegerine crystals to 2.5cm.


Hisingerite

Formula
Fe3+2Si2O5(OH)4·2H2
Crystal System
Monoclinic 
Crystal Habit
Acicular, Massive, Compact 
Cleavage
None, None, None 
Luster
Greasy (Oily) 
Color
brownish black, black 
Streak
yellowish brown 
Class
Monoclinic 
Fracture
Conchoidal 
Hardness

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